Demonstrate how to create a cube and a sphere using Blender's modeling primitives.

Creating a cube and a sphere using Blender's modeling primitives is a straightforward process that involves the use of basic shapes to form more complex objects. Blender provides several modeling primitives, including cubes and spheres, which serve as the foundation for many 3D models. Here is a step-by-step demonstration of how to create a cube and a sphere using Blender:

Creating a Cube:

1. Open Blender:
- Launch Blender and make sure you are in the default "Layout" workspace.

2. 3D Viewport:
- Ensure that you are in the 3D Viewport, the main workspace for modeling and manipulation.

3. Add a Cube:
- Press `Shift + A` to open the Add menu.
- Select "Mesh" from the menu.
- Choose "Cube" from the submenu.

4. Manipulate the Cube:
- The cube is added to the center of the 3D Viewport.
- Use the following controls to manipulate the cube:
- G: Activate the grab/move tool.
- X, Y, or Z: Constrain movement along the chosen axis.
- Left-click: Confirm the new position.

5. Scaling the Cube:
- Press `S` to activate the scale tool.
- Move the mouse to scale the cube.
- Left-click to confirm the new size.

6. Rotation (Optional):
- Press `R` to activate the rotate tool.
- Move the mouse to rotate the cube.
- Left-click to confirm the new orientation.

Creating a Sphere:

1. 3D Cursor Placement:
- Place the 3D cursor at the desired location for the sphere.
- Press `Shift + Right-click` to position the 3D cursor.

2. Add a UV Sphere:
- Press `Shift + A` to open the Add menu.
- Select "Mesh" from the menu.
- Choose "UV Sphere" from the submenu.

3. Adjusting Sphere Parameters:
- After adding the sphere, a small panel appears in the bottom left of the 3D Viewport.
- Adjust the parameters such as Segments and Rings to control the sphere's resolution.

4. Manipulate the Sphere:
- The sphere is added to the scene.
- Use the same controls as for the cube to manipulate and position the sphere:
- G: Activate the grab/move tool.
- X, Y, or Z: Constrain movement along the chosen axis.
- Left-click: Confirm the new position.

5. Scaling the Sphere (Optional):
- Press `S` to activate the scale tool.
- Move the mouse to scale the sphere.
- Left-click to confirm the new size.

6. Rotation (Optional):
- Press `R` to activate the rotate tool.
- Move the mouse to rotate the sphere.
- Left-click to confirm the new orientation.

Additional Tips:
- To toggle between different views (Front, Side, Top), use the number keys on the keyboard (Numpad 1, 3, 7).
- For precise transformations, you can enter numerical values by pressing `N` to open the Transform panel.

By following these steps, you can easily create a cube and a sphere using Blender's modeling primitives. These foundational skills are essential for more complex 3D modeling and scene creation in Blender.